CN210422616U - Mining and goaf backfilling device for sea area massive natural gas hydrate - Google Patents
Mining and goaf backfilling device for sea area massive natural gas hydrate Download PDFInfo
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- CN210422616U CN210422616U CN201920899000.8U CN201920899000U CN210422616U CN 210422616 U CN210422616 U CN 210422616U CN 201920899000 U CN201920899000 U CN 201920899000U CN 210422616 U CN210422616 U CN 210422616U
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Abstract
The utility model discloses a sea area block natural gas hydrate mining and goaf backfilling device, wherein a motor of the mining and goaf backfilling device is connected with a drill rod, and the drill rod is connected with a spiral drill bit through a rotating ring; the top end of a three-phase separator of the decomposition device is connected with a gas collecting tank through a gas conveying pipe, and the lower end of the three-phase separator is connected with a crushing box through a pipeline; in the solid fluidization and transmission system, the upper end of a high-pressure water pipeline is respectively connected with a cement backfill pipeline and a seawater inlet pipeline through switch valves, the cement backfill pipeline is connected with a cement container, and the high-pressure water pipeline is connected with a booster pump; the upper end of the hydrate conveying pipeline is connected with the crushing box. The rotating ring rotates forward to drive the spiral drill bit to rotate reversely, and the spiral drill bit is controlled to mine in a mining area; the rotating ring rotates reversely, so that the spiral drill bit is driven to rotate reversely, sediment silt and cement after hydrate decomposition are injected into a goaf through the high-pressure water pipeline together, and the working efficiency is high.
Description
Technical Field
The utility model belongs to the technical field of unconventional oil and gas reservoir development engineering, concretely relates to cubic natural gas hydrate in sea area exploitation and recovery return to district fill device.
Background
Natural gas hydrate is an energy resource with great potential, is widely distributed in oceans and permafrost all over the world, and is found in south China sea and Qilian mountain frozen soil areas.
The geological landform type of the sea mud volcano, hydrate dune, diapir, etc. shows a great amount of natural gas hydrate and a great amount of blocky natural gas hydrate in the landform construction of the sea mud volcano, hydrate dune, diapir, etc. various countries find the distribution of the sea mud volcano, jatropha, dune hydrate, etc. containing a great amount of blocky natural gas hydrate in the construction in the sea area of Blacket sea platform, American hydrate ridge, gulf of Mexico, Korean Tujongson basin, south Japan sea chest, Babados island, Mediterranean sea, the deep sea, jojoba sea, etc. 2.18 months in 1982, the Deep Sea Drilling Plan (DSDP)34 voyages for the first time to obtain the natural gas blocky core sample of the almost pure natural gas hydrate, the rock core sample of the almost pure natural gas hydrate is 1.05m longer than the rock core sample with a diameter of 5.6cm, located at a depth of water, 1718m, 249 a deep sea slope, the natural gas core sample has a unique property of preventing the natural gas hydrate from breaking down the blocky hydrate from the high-water-sand-ice-sand-water-sand-filled in the rock-water-buried rock-water-buried rock-free natural gas hydrate, the unique physical-water-buried rock-buried natural gas hydrate has a characteristic high-buried natural gas-water.
More practical novel patents exist at present for the solid-state fluidized exploitation of non-diagenetic natural gas hydrate. The southwest oil university puts forward a method for exploiting hydrate solid fluidization under an underbalanced reverse circulation condition in a novel patent CN201810515238.6 by utilizing an underbalanced drilling mode, when a drill reaches a hydrate layer, the drill is put down, high-pressure jet flow is utilized to enable the hydrate layer to be locally smashed by jet flow, a smashed area is called as a cavity, then seawater and natural gas mixed fluid is injected into a pilot hole well to cause the bottom hole to be under-pressure, and hydrate particles and silt are extracted along with the mixed fluid. The device aims at exploiting the hydrate in the cavity, namely, the solid fluidization process occurs in the external space of the drilled hole, and the installation and the disassembly of the drill bit are time-consuming and labor-consuming, so that continuous and high-yield operation cannot be realized.
The hydrate mining device of southwest oil university utility model's patent number CN201710249143.X and CN201710796364.9 has adopted solid-state fluidization exploitation mode equally, with the utility model discloses the device biggest difference lies in that the mode that adopts the injection to creep into carries out the tunnelling of position in patent CN201710249143.X and patent CN 201710796364.9. The biggest defect of jet drilling type hydrate solid fluidization exploitation is that a hydrate layer position which can be trapped by a water-stop casing is local, the water-stop casing can only move to a lower point after the exploitation of the trapped local area is finished once the water-stop casing is fixed, the position of the water-stop casing needs to be re-arranged when the water-stop casing is continuously drilled forwards, the working efficiency is relatively low, the pressure in the hydrate layer is reduced after the water-stop casing moves, the hydrate is decomposed, and a series of safety accidents such as exploitation collapse and well position instability are easily caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problem that the solid fluidization exploitation device of the natural gas hydrate in the prior art can not realize continuous operation, and the utility model aims at providing a sea area massive natural gas hydrate exploitation and goaf backfilling device, which comprises an exploitation ship, wherein the exploitation ship is sequentially provided with an excavation and exploitation device, a decomposition device and a solid fluidization and transmission system, and the solid fluidization and transmission system extends downwards to a drilling operation area along the sea level;
the digging and mining backfill device comprises a motor, a drill rod, a rotating ring, a spiral drill bit and a cement container, wherein the motor is connected with the drill rod, the drill rod is connected with the spiral drill bit through the rotating ring, and the spiral drill bit is controlled by the forward rotation of the rotating ring to mine in a mining area; the rotary ring rotates reversely to control the spiral drill to discharge backfill materials to a goaf;
a digging device: the power is provided by a motor, and the mined hydrate and sediment are brought into the drilling cavity by a spiral drill bit at the tail end of the drilling hole while drilling;
the rotary ring of the goaf backfill device has a reverse rotation function, namely the rotary ring rotates clockwise in the hydrate mining stage and rotates anticlockwise in the goaf backfill stage, and the motor controls the rotary ring to rotate anticlockwise in the goaf backfill stage, so that backfill can be discharged to a goaf in a discharging mode by matching with the discharging function of the spiral drill bit, and goaf backfill is realized.
A decomposition device: the device comprises a crushing box and a three-phase separator, wherein the top end of the three-phase separator is connected with a gas collecting tank through a gas conveying pipe, and the gas collecting tank is used for collecting and storing decomposed gas; the lower end of the three-phase separator is connected with the crushing box through a pipeline.
The three-phase separator has multiple functions of heating decomposition and three-phase separation, hydrate particles, silt and water reach the three-phase separator, the hydrate particles are decomposed to generate gas after being heated, the gas, the water and the sediment are separated in three phases, the water and the sediment are recovered for recycling, and the sediment silt is collected and injected into a goaf together with cement.
The solid fluidization and transmission system comprises a cement backfilling pipeline, a hydrate conveying pipeline and a high-pressure water pipeline, wherein the upper end of the high-pressure water pipeline is respectively connected with the cement backfilling pipeline and a seawater inlet pipeline through a switch valve, the cement backfilling pipeline is connected with a cement container, and the high-pressure water pipeline is connected with a booster pump; the upper end of the hydrate conveying pipeline is connected with the crushing box.
The seawater is injected into a high-pressure water body pipeline after being pressurized by a booster pump, the tail end of the pipeline is communicated with a drill hole, and the water body conveys the mined hydrate and silt into a crushing tank of a mining ship through a hydrate conveying pipeline under the high-pressure condition by using the special fluid property of the water body.
Furthermore, the rotating ring is set to be a gear a, the tail part of the spiral drill bit is provided with a gear b, and the gear a and the gear b are meshed with each other.
Furthermore, the end of the auger bit is provided with a conical drilling cavity, and the interior of the auger bit comprises a central shaft and a spiral sheet spirally arranged on the central shaft.
Furthermore, an electromagnetic oscillator is arranged inside the crushing box. The hydrate block is crushed and granulated, and simultaneously the electromagnetic oscillation effect of the hydrate block is utilized to heat the interior of the box body, so that the decomposition of the hydrate is promoted.
Furthermore, the gas collecting tank and the three-phase separator are arranged on the decomposing and gas collecting platform, the cement container is arranged on the mining space backfilling platform, and the decomposing and gas collecting platform, the crushing tank and the mining space backfilling platform are all arranged on the mining ship.
Furthermore, the outer side part of the solid fluidization and transmission system extending above the sea level is provided with a sleeve, and the motor and the booster pump are respectively arranged on two sides of the sleeve.
Further, the solid-state fluidization and transmission system is fixedly installed through a seabed well cementation platform.
Furthermore, a heating ring is arranged in the three-phase separator, the heating ring provides a temperature environment required by hydrate decomposition, hydrate particles are completely decomposed to generate gas, and the three-phase separator collects gas, discharges water and discharges sand.
Furthermore, the outer sides of the hydrate conveying pipeline and the high-pressure water pipeline of the solid fluidization and transmission system are sleeved with guide pipes, and the tail ends of the hydrate conveying pipeline and the high-pressure water pipeline are communicated with the drill hole of the drilling operation area.
The utility model has the advantages that:
(1) the process from mining to gas collection is a continuous operation process, continuous high-efficiency production can be realized after the device is opened, the mining and conveying of the hydrate can be synchronously carried out, the two operations are not influenced by each other, and the working efficiency is high.
(2) The tail end of the conduit of the solid fluidization and transmission system extends into the horizontal well position, a drill hole formed by the conduit horizontally extends into the hydrate layer by utilizing the horizontal well position, and the contact area between the drill hole and the hydrate layer is large, so that the solid fluidization and transmission system is beneficial to high-yield exploitation.
(3) The auger bit adopts helical structure, when guaranteeing that hydrate is effectively excavated and not influence drilling and continue to tunnel, can bring the hydrate block who excavates into the drilling cavity automatically, and the auger bit is set up to diversified revolution mechanic, not only can excavate the hydrate in the dead ahead, can also realize the excavation of hydrate in certain position through the drill bit is whole rotatory (drilling direction does not change).
(4) The hydrate is mined into a drill hole formed by the intake conduit and then is hydraulically conveyed to a ship to form a continuous rapid operation process, and the hydrate and a sedimentary deposit are in a full-isolation state, so that the partially decomposed hydrate gas cannot escape to the seabed in the whole process, and the environmental benefit is remarkable.
(5) The hydrate decomposition device is a device capable of realizing solid-liquid-gas three-phase separation, and on the basis, the outer wall of the three-phase separator is provided with a heating ring, so that high-temperature conditions required by hydrate decomposition can be created; the sediment and the water body after the three-phase separation can be recycled, the sediment is used for mining and backfilling, and the water body is used for solid fluidization of the hydrate after recovery, so that the requirements of resource conservation and safe production are met.
(6) The utility model discloses the device has set up twice cubic hydrate broken procedure: auger bit, crush box (electromagnetic oscillator); two heating programs are set: a crushing box (comprising an electromagnetic oscillator) and a three-phase separator (comprising a heating ring); the difficult problem that the massive natural gas hydrate is difficult to decompose is fully solved.
(8) The mining work realizes the allocation and use of the cement backfill pipeline and the high-pressure water pipeline through a switch valve connected with the cement backfill pipeline at intervals, and the goaf backfilling can prevent the goaf of the hydrate from collapsing, thereby avoiding a series of safety accidents.
(9) In the goaf backfilling stage, the clockwise and anticlockwise bidirectional rotation functions of the rotating ring are mainly adopted to drive the spiral drill bit to rotate reversely, and backfill is discharged to the goaf.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a position relationship diagram of the hydrate decomposition and gas collection platform, the air-mining backfill platform and the mining ship of the utility model.
Fig. 3 is a schematic view of the pipe distribution of the present invention.
Fig. 4 is a schematic view of the rotary ring and the auger bit of the present invention: (a) a plan view; (b) side view.
Fig. 5 is a schematic structural diagram of the present invention in which the gear a of the rotary ring and the gear b of the auger bit are not engaged.
Fig. 6 is a schematic structural diagram of the engagement between the gear a of the rotary ring and the gear b of the auger bit according to the present invention.
Wherein, 1, hydrate decomposition and gas collection platform; 2. a gas collection tank; 3. a gas delivery pipe; 4. a three-phase separator; 5. heating a ring; 6. an electromagnetic oscillator; 7. a crushing box; 8. a mining vessel; 9. an on-off valve; 10. a seawater inlet conduit; 11. backfilling the pipeline with cement; 12. a cement container; 13. a mining backfill platform; 14. sea level; 15. a booster pump; 16. a subsea cementing station; 17. a motor; 18. a sleeve; 19. a hydrate delivery conduit; 20. a drill stem; 21. a hydrate deposit; 22. a high pressure water body pipeline; 23. high-pressure water flow direction; 24. drilling a working area; 25. a helical drill bit; 26. hydrate fluidization transport direction; 27. a conduit; 28. rotating the ring; 29. a gear a; 30. and a gear b.
Detailed Description
The following are the steps and the details of the whole process of exploiting the hydrate by the device of the utility model:
the utility model discloses in the device exploitation ship 8 berths on sea level 14, hydrate decompose with gas collection platform 1 and adopt empty backfill platform 13 all to be located exploitation ship 8, in the drawing both with the hull separation for drawing and explain the convenience consider (as shown in figure 2).
There are three independent pipe systems in the conduit 27 outside the solid state fluidization and transfer system, which are the drill pipe 20, the high pressure water pipe 22 and the hydrate delivery pipe 19, respectively, the high pressure water pipe 22 and the hydrate delivery pipe 19 are located on both sides of the drill pipe 20 (as shown in fig. 3), respectively, and the high pressure water flows 23 as shown in fig. 1.
The utility model discloses a difference of device and patent CN201810515238.6 is as follows, ① patent CN201810515238.6 hydrate exploitation local area is by forming the jet fragmentation region behind the efflux, is called the cavity, and the exploitation target is the hydrate in this cavity, the utility model discloses the device directly utilizes screw drill 25 to carry out the drilling of hydrate horizon, excavates hydrate and silt in the hydrate layer to the drilling cavity earlier, carries out solid-state fluidization again, and solid-state fluidization process takes place in the drilling inner space promptly, ② patent CN201810515238.6 hydrate solid-state fluidization is through pouring into natural gas and sea water mixture into the collared well, and solid-state fluidizing medium is the gas-liquid mixed medium, is to utilize under-pressure exploitation hydrate and silt, the utility model discloses the device utilizes the flow mechanics characteristic of high-pressure water, through pouring into high-pressure water into to the drilling, as the medium that hydrate and silt transported, ③ patent CN201810515238.6 drill bit need lift off after arriving the horizon, installs the jet fragmentation device, and the hydrate in the local cavity hydrate exploitation finishes again to install forward, the screw drill 25, directly can bring into the cavity in the high yield when the hydrate, realize continuous exploitation, the operation mode of environmental protection.
As shown in fig. 1, fig. 2 and fig. 3, the sea area block natural gas hydrate mining and goaf backfilling device comprises a mining ship 8, a hydrate decomposition and gas collection platform 1 and a goaf backfilling platform 13, wherein the hydrate decomposition and gas collection platform 1 and the goaf backfilling platform are both positioned on the mining ship 8.
The hydrate decomposition and gas collection platform 1 comprises a gas collection tank 2, a gas delivery pipe 3 and a three-phase separator 4, the gas collection tank 2 is connected with the three-phase separator 4 through the gas delivery pipe 3, the gas collection tank 2, the gas delivery pipe 3 and the three-phase separator 4 are all located on the hydrate decomposition and gas collection platform 1, a heating ring 5 is arranged in the three-phase separator 4, the three-phase separator 4 is connected with a crushing box 7 through a hose, and an electromagnetic oscillator 6 is arranged in the crushing box 7;
adopt empty backfill platform 13 includes cement container 12, and cement container 12 links to each other with cement backfill pipeline 11, cement backfill pipeline 11 links to each other with ooff valve 9, and hydrate pipeline 19 links to each other with crushing case 7, and hydrate pipeline 19, high-pressure water pipeline 22's outside cover are equipped with pipe 27, and 18 both sides of sleeve pipe are provided with motor 17 and booster pump 15 respectively, high-pressure water pipeline 22 links to each other with booster pump 15. Wherein, the high-pressure water pipeline 22 inside the drill hole is a power pipeline for transporting hydrate, and is matched with the cement backfill pipeline 11 by the switch valve 9 for use.
The outer sides of a hydrate conveying pipeline 19 and a high-pressure water body pipeline 22 of the solid fluidization and transmission system are sleeved with guide pipes 27, the tail ends of the hydrate conveying pipeline 19 and the high-pressure water body pipeline 22 are communicated with a drilled hole of a drilling operation area 24, a mining device is arranged on the mining ship 8 and comprises a motor 17, a drill rod 20, a rotating ring 28 and a spiral drill bit 25, the motor 17 is connected with the drill rod 20, and the drill rod 20 is connected with the spiral drill bit 25 through the rotating ring 28.
As shown in fig. 4, 5 and 6, the end of the auger bit 25 is provided as a tapered bore cavity, and the interior of the auger bit 25 includes a central shaft and a flight helically provided on the central shaft. The rotary ring 28 is set to be a gear a29, the tail part of the spiral drill bit 25 is provided with a gear b30, the gear a29 is meshed with the gear b30, after the gear a29 is meshed with the gear b30, the rotary ring 28 rotates in the positive direction to control the spiral drill bit 25 to mine in a mining area, and the mining area is a hydrate deposition layer 21; the rotary ring 28 rotates in reverse to control the auger bit 25 to discharge backfill into the gob.
The utility model discloses the unique physical property of natural gas hydrate self is considered to the device-hydrate purity is high (the exploitation efficiency is high), and the hydrate decomposes relatively difficultly, provides a cubic hydrate horizontal well drilling exploitation and backfill device. The device utilizes the supporting auger bit 25 of horizontal well, and auger bit 25 can be brought into the drilling cavity after the bold cubic hydrate part is fragmented automatically when constantly drilling, and the high pressure water body after the reuse pressure boost carries hydrate and deposit silt to the exploitation ship 8 through hydrate pipeline 19. Considering the difficult problem that the decomposition of the block natural gas hydrate is slow, the utility model discloses the device has laid crushing case 7 (breakage and heating) and hydrate decomposition and gas collection platform 1 (three-phase separator 4) on hydrate exploitation ship 8, and crushing case 7 inner wall is equipped with electromagnetic oscillator 6, and electromagnetic oscillator 6 heats the material in the box body because its electromagnetic oscillation effect can be heated when smashing the block hydrate, and the high temperature condition that the heating was created more helps promoting the decomposition of hydrate; the hydrate decomposition and gas collection platform 1 is provided with a three-phase separator 4 (heating and three-phase separation), the outer wall of the three-phase separator 4 is provided with a heating ring 5, the heating ring 5 heats the three-phase separator 4, so that hydrate particles are completely decomposed, decomposed gas, water and sediments are separated, water and sediments are recovered for cyclic utilization (water is injected into a high-pressure water pipeline 22 for fluidization conveying of massive hydrates, the sediments are used for backfill of a goaf), and the decomposed gas is collected by the gas collection tank 2.
The specific operation process of the sea area block natural gas hydrate mining and goaf backfilling device comprises the following steps:
(1) when the production ship 8 reaches a designated area, the production ship is lowered into the seabed well cementation platform 16 and the guide pipe 27, the drill rod 20 is lifted, the drill bit is connected, the drilling tool is lowered, and the well drilling is started;
(2) when the hydrate layer is drilled, starting a horizontal drilling mode, installing a spiral drill bit 25, a high-pressure water pipeline 22 and a hydrate conveying pipeline 19, and starting hydrate drilling and production;
(3) hydrate excavation: the motor 17 provides power, the spiral drill bit 25 rotates, and the spiral drill bit 25 brings the drilled hydrate block and the included partial silt into the drilling cavity while drilling;
(4) solid-state fluidization: sea water is injected into a high-pressure water body pipeline 22, the sea water enters the high-pressure water body pipeline 22 along a sea water inlet pipeline 10, namely the sea water becomes high-pressure water flow under the pressurization effect of a booster pump 15 and flows into a drilling cavity from the high-pressure water body pipeline 22, the hydrate and silt dug by the high pressure generated by the water flow are conveyed into a crushing box 7 of a mining ship 8, and the fluidization conveying direction 26 of the hydrate is shown in figure 1;
(5) after the hydrate and sediment reach the hydrate crushing box 7, the hydrate and sediment are crushed and granulated under the action of the electromagnetic oscillator 6, and the electromagnetic oscillation effect of the electromagnetic oscillator 6 heats the inner space of the box body at the same time to promote the decomposition of the hydrate;
(6) crushing and granulating the hydrate: after the hydrate is conveyed to the crushing box 7, the electromagnetic oscillator 6 on the inner wall of the crushing box 7 starts to work, and the hydrate block is crushed and granulated under the action of electromagnetic oscillation and is heated at the same time;
(7) decomposition of hydrate: hydrate particles, silt and water reach the three-phase separator 4, the outer ring of the three-phase separator 4 contains a heating ring 5, the heating ring 5 provides a temperature environment required by hydrate decomposition, the hydrate particles are completely decomposed to generate gas, and the three-phase separator 4 collects gas, drains water and discharges sand;
(7) gas collection: after the hydrate is decomposed, the generated gas is conveyed to the gas collecting tank 2 for storage by the three-phase separator 4, then drainage and sand discharge are carried out, and water and sediments are recycled;
(8) backfilling a goaf: after the gas, water and sediment are separated by the hydrate decomposition and gas collection station, the water body can be recycled, sediment and sand are collected and injected into a goaf together with cement, and after the spiral drill 25 tunnels for a certain distance, the rotary ring 28 is controlled to rotate reversely (anticlockwise), the rotary ring 28 operates reversely to enable the spiral drilling integrally communicated with the rotary ring to rotate reversely, so that goaf backfill materials are discharged (spit) to the goaf, goaf backfill is achieved, and goaf collapse is prevented.
The spiral drill 25 in the step (2) is only used for mining hydrates in hydrate layers, the spiral drill 25 has a unique spiral structure, and the mined hydrates can be automatically brought into a drilling cavity while drilling forwards; the drill bit for drilling in the vertical shaft in the step (1) can flexibly select drill bits with other structures.
The hydrate drilled by the auger bit 25 is automatically brought into the drilling cavity along the auger cavity of the drill bit, and the high-pressure water in the high-pressure water pipeline 22 cannot escape from the drill bit part, i.e. the auger bit 25 is of a one-way feeding structure, so that a relatively closed operation environment is ensured inside the drilling hole; the cement is injected into the goaf through the high-pressure water body pipeline 22 in the hydrate backfilling process, and as shown in fig. 5 and 6, the spiral drill bit 25 and the drill rod 20 are connected by the rotating ring 28, namely the gear a29 is meshed with the gear b30, so that a space for injecting the cement into the goaf is reserved without dismounting the drill bit, and the working efficiency can be obviously improved.
The above description is not a limitation of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various changes, modifications, additions and substitutions can be made without departing from the scope of the invention as defined in the accompanying claims.
Claims (8)
1. The sea area block natural gas hydrate mining and goaf backfilling device comprises a mining ship and is characterized in that a mining and goaf device, a decomposition device and a solid fluidization and transmission system are sequentially arranged on the mining ship, and the solid fluidization and transmission system extends downwards to a drilling operation area along the sea level;
the digging and mining backfill device comprises a motor, a drill rod, a rotating ring, a spiral drill bit and a cement container, wherein the motor is connected with the drill rod, the drill rod is connected with the spiral drill bit through the rotating ring, and the spiral drill bit is controlled by the forward rotation of the rotating ring to mine in a mining area; the rotary ring rotates reversely to control the spiral drill to discharge backfill materials to a goaf;
a decomposition device: the device comprises a crushing box and a three-phase separator, wherein the top end of the three-phase separator is connected with a gas collecting tank through a gas conveying pipe, and the lower end of the three-phase separator is connected with the crushing box through a pipeline;
the solid fluidization and transmission system comprises a cement backfilling pipeline, a hydrate conveying pipeline and a high-pressure water pipeline, wherein the upper end of the high-pressure water pipeline is respectively connected with the cement backfilling pipeline and a seawater inlet pipeline through a switch valve, the cement backfilling pipeline is connected with a cement container, and the high-pressure water pipeline is connected with a booster pump; the upper end of the hydrate conveying pipeline is connected with the crushing box.
2. The sea area block natural gas hydrate mining and goaf backfilling device according to claim 1, wherein the rotating ring is provided with a gear a, the tail part of the spiral drill bit is provided with a gear b, and the gear a and the gear b are meshed with each other.
3. The sea area bulk natural gas hydrate mining and goaf backfilling device according to claim 1, wherein the end of the auger bit is provided with a tapered bore cavity, and the interior of the auger bit comprises a central shaft and a spiral sheet spirally arranged on the central shaft.
4. The sea area block natural gas hydrate mining and goaf backfilling device according to claim 1, wherein an electromagnetic oscillator is arranged inside the crushing box.
5. The sea area block natural gas hydrate mining and goaf backfilling device according to claim 1, wherein a sleeve is arranged at the outer side part of the solid fluidization and transmission system extending above the sea level, and the motor and the booster pump are respectively arranged at two sides of the sleeve.
6. The sea area bulk natural gas hydrate mining and goaf backfilling device according to claim 1, wherein the solid fluidization and transmission system is fixedly installed through a subsea cementing platform.
7. The sea area block natural gas hydrate mining and goaf backfilling device according to claim 1, wherein a heating ring is arranged inside the three-phase separator, and gas is generated by decomposing hydrates through the heating ring.
8. The sea area block natural gas hydrate mining and goaf backfilling device according to claim 1, wherein conduits are sleeved outside the hydrate conveying pipeline and the high-pressure water pipeline of the solid fluidization and transmission system, and the tail ends of the hydrate conveying pipeline and the high-pressure water pipeline are communicated with the drill hole of the drilling operation area.
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| CN201920899000.8U CN210422616U (en) | 2019-06-14 | 2019-06-14 | Mining and goaf backfilling device for sea area massive natural gas hydrate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852409A (en) * | 2020-07-24 | 2020-10-30 | 黑龙江科技大学 | Natural gas hydrate exploitation device and method |
| CN111894530A (en) * | 2020-07-30 | 2020-11-06 | 吉林建筑大学 | Seabed combustible ice filling mining device and mining method thereof |
| CN112253058A (en) * | 2020-10-19 | 2021-01-22 | 青岛海洋地质研究所 | System and method for artificially enriching and exploiting deep-water shallow-layer low-abundance unconventional natural gas |
-
2019
- 2019-06-14 CN CN201920899000.8U patent/CN210422616U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852409A (en) * | 2020-07-24 | 2020-10-30 | 黑龙江科技大学 | Natural gas hydrate exploitation device and method |
| CN111852409B (en) * | 2020-07-24 | 2022-05-06 | 黑龙江科技大学 | Natural gas hydrate exploitation device and method |
| CN111894530A (en) * | 2020-07-30 | 2020-11-06 | 吉林建筑大学 | Seabed combustible ice filling mining device and mining method thereof |
| CN112253058A (en) * | 2020-10-19 | 2021-01-22 | 青岛海洋地质研究所 | System and method for artificially enriching and exploiting deep-water shallow-layer low-abundance unconventional natural gas |
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